B&K 125.5 S2, 125.7 S2 user manual Speaker Outputs, Input/Output Connections

6 INPUT/OUTPUT CONNECTIONS

Use either RCA unbalanced or XLR balanced to connect the preamplifier to amplifier.

SURROUND BACK LEFT

C O N T R O L I / O
CONTROL IN ALLOWS AMPLIFIER
OPERATION WHEN A 5-24V SIGNAL
IS APPLIED WITH A 3.5mm MINI JACK
				INPUT 1
C T R L	DNUO	WER	BLE
I N		WLOPO	ELRTNA
	R	V	C	X L R
C T R L	EG	+12	12V	( B A L A N C E D )
O U T	EV	G	+
1 2 V D C
2 0 0 m A	LE	IN	IP
	S	R	T

R C A

( U N B A L A N C E D )

BUTTON

OUT

RCA Unbalanced Connections

SURROUND LEFT		CENTER
	FRONT LEFT		FRONT RIGHT

INPUT 2	INPUT 3	INPUT 4	INPUT 5
	X L R ( B A L A N C E D )		X L R ( B A L A N C E D )
	R C A ( U N B A L A N C E D )		R C A ( U N B A L A N C E D )
	BUTTON		BUTTON
	OUT		OUT

OR

SURROUND RIGHT

SURROUND BACK RIGHT

INPUT 6 INPUT 7

X L R ( B A L A N C E D )

R C A ( U N B A L A N C E D )

BUTTON

OUT

C O N T R O L I / O
CONTROL IN ALLOWS AMPLIFIER
OPERATION WHEN A 5-24V SIGNAL
IS APPLIED WITH A 3.5mm MINI JACK
				INPUT 1
C T R L	DNUO	WER	BLE	X L R
I N		WLOPO	ELRTNA
	R	V	C	( B A L A N C E D )
C T R L	EG	+12	12V
O U T	EV	G	+
1 2 V D C
2 0 0 m A	LE	IN	IP
	S	R	T

R C A

( U N B A L A N C E D )

INPUT 2 INPUT 3

X L R ( B A L A N C E D )

R C A ( U N B A L A N C E D )

INPUT 4 INPUT 5

X L R ( B A L A N C E D )

R C A ( U N B A L A N C E D )

INPUT 6 INPUT 7

X L R ( B A L A N C E D )

R C A ( U N B A L A N C E D )

BUTTON

PUSHED IN

BUTTON	BUTTON	BUTTON
PUSHED IN	PUSHED IN	PUSHED IN

	SURROUND LEFT	CENTER	SURROUND RIGHT
SURROUND BACK LEFT	FRONT LEFT	FRONT RIGHT	SURROUND BACK RIGHT

XLR Balanced Connections

SPEAKER OUTPUTS

Binding posts are provided for speaker connections. There is one pair provided for each amplifier channel output. They are designed to accept a banana-type plug, spade-lug connector (shown right), terminal posts, or bare wire. They are color coded for easy identification. The positive (+) RED post should always be connect- ed to the speakers (+) RED jack. The negative (-) BLACK post should always be

connected to the speakers (-) BLACK jack. Spade Connector Banana Jack

Shown right is the ampli- fier to speaker connec- tions (4 gauge (AWG) wire maximum).

CONTROL IN ALLOWS AMPLIFIER

OPERATION WHEN A 5-24V SIGNAL

IS APPLIED WITH A 3.5mm MINI JACK

		WER
C T R L			BLE			C H A N N E L 1 I N P U T
	OUND				X L R
I N		LOW PO	TRL ENA	( B A L A N C E D )
	R	V	C
C T R L	G	+12	12V		R C A
O U T	E			( U N B A L A N C E D )
	EV		+
1 2 V D C		G
2 0 0 m A	LE	NI	IP
	S	R	T
C O N T R O L I / O
F U S E							F	U	SE
C A U T I O N : F O R C O N T I N U E D						E				F
P R O T E C T I O N A G A I N S T R I S K
O F F I R E R E P L A C E O N LY W I T H						S				U
						U			E	S
S A M E T Y P E A N D R AT I N G .								F

C H A N N E L 1 O U T P U T

P O S I T I V E N E G AT I V E

	C A U T I O N
	R I S K O F E L E C T R I C S H O C K
A C L I N E	D O N O T O P E N

C H A N N E L 2 I N P U T				C H A N N E L 3 I N P U T
			X L R ( B A L A N C E D )
			R C A ( U N B A L A N C E D )
	F	USE			F	USE
E			F	E			F
			U				U
S				S
U			S	U			S
		F E				F E
C H A N N E L 2 O U T P U T				C H A N N E L 3 O U T P U T

P O S I T I V E N E G AT I V E P O S I T I V E N E G AT I V E

S E R I A L #

C H A N N E L 4 I N P U T				C H A N N E L 5 I N P U T
			X L R ( B A L A N C E D )
			R C A ( U N B A L A N C E D )
	F	USE			F	USE
E			F	E			F
			U				U
S				S
U			S	U			S
		F E				F E
C H A N N E L 4 O U T P U T				C H A N N E L 5 O U T P U T

P O S I T I V E N E G AT I V E P O S I T I V E N E G AT I V E

C H A N N E L 6 I N P U T				C H A N N E L 7 I N P U T
			X L R ( B A L A N C E D )
			R C A ( U N B A L A N C E D )
	F	USE			F	USE
E			F	E			F
			U				U
S				S
U			S	U			S
		F E				F E
C H A N N E L 6 O U T P U T				C H A N N E L 7 O U T P U T

P O S I T I V E N E G AT I V E P O S I T I V E N E G AT I V E

H i g h P e r f o r m a n c e

A u d i o / V i d e o S y s t e m s

H a n d - M a d e i n t h e U . S . A .

(+))-(

(+))-(

(+))-(

(+))-(

(+))-(

(+))-(

(+))-(

Surround	Surround Front Left	Center	Front Right Surround	Surround
Back Left	Left		Right	Back Right